621567 ÷ 45 
We're looking to find how many times 45 goes into 621567.

Step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 45

On to step 2:
If we divide 62 by 45, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 45 from 62 to get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 45

Advancing to step 3:
171 divided by 45 is 3 with a remainder of 36.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we subtract 135 from 171, we get 36.
Bring next digit (5) of the dividend behind the 36 and repeat the process: 365 / 45

Going ahead to step 4:
When dividing 365 by 45, we get 8 with a remainder of 5.
The next digit of our result is 8. 
Result so far: 138.0
Subtracting 360 from 365 leaves us with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 45

Moving on to step 5:
45 goes into 56 1 times with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1381.0
If we subtract 45 from 56, we get 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 45

On to step 6:
The number 45 fits into 117 2 times, leaving a remainder of 27.
Write down 2 as next digit of the result. 
Result so far: 13812.0
Subtracting 90 from 117 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
45 can be fit into 270 6 times, resulting in a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 13812.6
The remainder is 0 after subtracting 270 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
0 divided by 45 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 13812.6
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 13812.6
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 13812.6, with a leftover of 0.0.